Combination stop motion and belt shipper mechanism



W. J: SCOTT Jan. 2, 1940.

COMBINATION STOP MOTION AND BELT SHIPPER MECHANISM BY m m ATTORNEYS.

Filed March 28, 1938 Patented Jan. 2, 1940 UNITED STATES PTENT OFFICE COMBINATION STOP MOTION AND BELT SHIPPER MECHANISM This invention relates to a belt shipper mecha n1sm and stop motion for a textile machine, particularly such apparatus as illustrated in my Patent No. 2,086,096, dated July 6, 1937; and has for one of its objects the provision of an arrangement so that the operator of the machine who shifts the belt shipper lever will not be working against some force such as a spring provided for stopping the machine upon the happening of some fault in the work.

Another object of the invention is to provide some operable mechanism which will be actuated by an electric circuit which is energized for actuation upon a fault occurring in the work.

Another object of the invention is to so arrange the apparatus that the machine may be completely started before the circuit in which the stop motion mechanism is provided is closed.

Another object of the invention is to provide an arrangement which will not he accidentally operated by vibration which sometimes causes premature operation of the stop mechanism in devices of this general character.

Another object of the invention is to provide a simple installation using a large number of parts for the operation of my device, which parts are already present on the machine.

Another object of the invention is the utilization of a low voltage for in turn closing a high voltage circuit which provides the necessary force for operation of the shipper lever.

With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is a diagrammatic view partly in section illustrating various operating parts which go to make up this invention;

Fig. 2 is an enlarged detail view showing the switch which is installed in the arrangement;

Fig. 3 is a section on line 3-3 of Fig. 2.

In operating stop motions many of which are the subject of my previous patents, I have provided a spring on the shipper lever of the machine for pulling the shipper lever to stopped position, the shipper lever being held by a latch against movement by the spring until the happening of Wconsocket, R. I.

1938, Serial No. 198,415

of ten pounds or upwards and while a single operation a day is of no hardship upon the operator, in other situations Where the machine must be started and stopped a large number of times the energy required for moving the operating lever to start the machine is found to be very tiring upon the operator; and in order to avoid this extra effort required in stop motions of the character referred to, an example of which is shown in my above-mentioned Patent No. 2,086,- 096, I have provided that the movement of the shipper lever will not be hampered by any force tending to move it to neutral or stop position, and yet I have a power, a mechanical or electrical means for stopping the machine; and the following is a more detailed description of the present embodiment of this invention,illustrating the preferred means by which these advantageous results may be accomplished:

With reference to the drawing, l0 designates the tight pulley on shaft II and I2 the loose pulley on this shaft, a belt I3 being moved from one pulley to the other depending upon the desire for rotation of the shaft II. This belt is shifted by a U-shaped frame M mounted upon a shaft I 5 slidable in bearings l6 and I! of some framework supported by bracket 33 attached as at 34 to some point about the machine, such as overhead on the beams or joist of the building. A shipper rod I8 has an opening to receive a pin it] extending through it which pin is adjustably mounted by means of a collar 20 on the shaft l5. This rod is connected as at 2| to the shipper lever 22 which is hand actuated and pivoted at some point 23. Thus, by rocking the shipper lever 22 about the pivot 23 to the position shown in dotted lines as at 24 the belt is shifted from the tight to the loose pulley or vice-versa as occasion requires for starting or stopping the machine. This is all known structure and no part of the present invention.

In order to supply mechanism for moving the belt I3 from the tight pulley ill to the loose pulley l2, I have provided a solenoid 25 having a plunger 26 slidable into the coil 25 and connected by some loose connection such for instance as by U-shaped links 21 and 23, one mounted upon the plunger 26 and the other upon the shaft I5, so that when the coil 25 is energized the plunger 26 will be drawn into the coil and will slide the shaft l5 from the position shown in full lines in the drawing to the position shown in dotted lines and thereby move the belt from the tight pulley to the loose pulley and permit the shaft II to come to a stop. This solenoid 25 is mounted upon a base 29 which is supported by bracket 30 from frame 3| by means of bolt 32 so that the same is adjustable as to position with reference to the support H.

The energy for solenoid 25 is supplied from the volt line 35 through the fuse box 36, one lead 3? extending to one end of the solenoid coil and the other lead 38 extending from the solenoid coil to a contact 39, while a companion contact 33 is connected to the other side of the line 35 by the lead ii through the fuse box 36. When these contacts 39, ii! are closed by the bridging element 62 the solenoid is energized and the belt shifted to the loose pulley.

The machine in connection with which this mechanism is designed to operate is here shown as a textile machine such as that illustrated in my above mentioned Patent No. 2,086,096, in which the Work 45 extends over a lever 56 pivoted as at 1"! and weighted as at 38 and so long as the work runs over this lever the position of the lever is maintained substantially as illustrated. If, however, the work i5 fails the weight causes the opposite end of the lever M5 to rise to engage the contact 69 and closes the circuit for the stopping of the machine. This circuit may be traced from the contact 49 through lead one side of transformer 5!, it being explained that the voltage in this circuit is about twelve volts or some very low voltage which will not cause arcing or pass through the human body. From this transformer 52 a lead 52 extends to one contact of switch 53 while the other contact 54 of the switch is mounted. upon a swinging lever 55 pivoted as at 55 on bracket 5?, the circuit continuing through lead 58 to one side 39 of the coil 65! of a relay designated generally 5%]. The other side of the relay coil 6! is grounded as at 62, while the other side of the work switch at the machine is grounded as at &3.

Thus, upon the closing of'the contact d5, t9 and 53, 54 the circuit is complete to operate the relay to draw down its armature 64 and with it connected to the insulation 5.5 upon which is carried the bridging element 42 to complete the circuit to the solenoid and operate the belt shifting mechanism. The switch at contacts 53, 54 bridged by lever arm. 55 has the free end of this lever arm 55, which I will designate 66, extend to a position between lugs 61 and 68 positioned upon'the shipper rod I3, these lugs being spaced suficiently so that this switch 53, 54 is not closed until the belt is on the tight pulley and the machine is well in operation. Thus, the sliver 45 holds the lever 46 in a position out of engagement with the contact 49 so that the machine may be started without the necessity of holding this part in position until the machine is in operation. This dwell or delay is also important in that when the belt is shifted from the pulley Ill to the loose pulley ii. for stopping the machine, the belt attains its position on the loose pulley for stopping the machine before the lug (58 causes complete opening of the circuit at contacts 53 and 54, consequently the bridging element 42 is not released for the throwing off of energy in the high voltage circuits which moves the belt until this low voltage circuit is opened.

The loose connection 21, 2B of the core of the solenoid and the rod I5 is also of importance in that the looseness permits the solenoid core to get a start and gain some momentum upon completion of the electric circuit before its load is picked up which requires a great deal less .force and quicker operation than were the loose connection not present.

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible, the invention being defined and limited only by the terms of the appended claims.

I claim:

1. In combination with a machine having a belt drive and a belt shipper mechanism, an electric circuit including means to shift the belt when the circuit is energized, a second electric circuit of lower voltage including a means operable upon a fault of the work passing through the machine to energize said circuit, and means in said second circuit responsive to being energized to in turn energize the first circuit and cause movement of the shipper rod to stop position.

2. In combination with a machine having a belt drive and a belt shipper mechanism, an electric circuit including means to shift the belt when the circuit is energized, a second electric circuit including a means operable upon a fault of the work passing through the machine to energize said circuit, means in said second circuit responsive to being energized to in turn energize the first circuit and cause movement of the shipper rod to stop position and a breaking of the second circuit.

3. In combination with a machine having a belt drive and a belt shipper mechanism, an electric circuit including means to shift the belt when the circuit is energized, a second electric circuit including a means operable upon a fault of the work passing through the machine to energize said circuit, means in said second circuit responsive to being energized to in turn energize the first circuit and cause movement of the shipper rod to stop position and a breaking of the second circuit, the movement of the shipper rod to operating position restoring said second circuit, and means to prevent restoring of said second circuit until the belt is completely shifted to operable position.

4. In combination with a machine having a belt drive and a belt shipper mechanism, an electric circuit including means to shift the belt when the circuit is energized, a second electric circuit including a means operable upon a fault of the work passing through the machine to energize said circuit, means in said second circuit responsive to being energized to in turn energize the first circuit and cause movement of the shipper rod to stop position and a breaking of the second circuit, the movement of the shipper rod to operating position restoring said second circuit, and a loose connection to prevent restoring of said circuit until the belt is completely shifted to operable position.

5. In combination with a machine having a belt drive and a belt shipper mechanism. electric circuit means including a solenoid loosely connected to the shipper rod to shift the belt when the circuit is energized, a second electric circuit including a means operable upon fault of the work passing through the machine to energize said circuit, means in said second circuit responsive to being energized to in turn energize the first circuit and cause movement of the shipper rod to stop position and a breaking of the second circuit.

6. In combination with a machine having a belt drive and a belt shipper mechanism including a shipper rod, a pair of lugs spaced along said rod, an electric circuit having a switch therein, a shift lever for said switch positioned to be actuated by one lug in one direction and. by the other lug in the other direction, said lugs being spaced sufficiently so that the rod has moved substantially its entire movement before the lever is actuated to shift the switch.

7. In combination with a machine having a belt 10 drive and a machine having an electric stop motion and a belt shipper mechanism including a shipper rod, a pair of lugs spaced along said rod, an electric circuit having a switch therein, a shift lever for said switch positioned to be actuated by one lug in one direction and by the other lug in the other direction, said lugs being spaced suificiently to provide a dwell and permit the stop motion switch to open before the shift lever closes the switch in said circuit.

WALTER J. SCOTT. 

